EP1704378B1 - Mehrstufen-warmetauscheranordnung - Google Patents

Mehrstufen-warmetauscheranordnung Download PDF

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Publication number
EP1704378B1
EP1704378B1 EP05700556.3A EP05700556A EP1704378B1 EP 1704378 B1 EP1704378 B1 EP 1704378B1 EP 05700556 A EP05700556 A EP 05700556A EP 1704378 B1 EP1704378 B1 EP 1704378B1
Authority
EP
European Patent Office
Prior art keywords
primary side
valve
temperature
secondary side
heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05700556.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1704378A1 (de
Inventor
Atli Benonysson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
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Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Publication of EP1704378A1 publication Critical patent/EP1704378A1/de
Application granted granted Critical
Publication of EP1704378B1 publication Critical patent/EP1704378B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water

Definitions

  • the invention relates to a multi-stage heat exchanger assembly having a primary side and a secondary side, which are in heat-transmitting connection and can be flowed through in opposite directions, wherein the primary side has at least two offset in the flow direction feed points and a valve arrangement is provided, which cooperates with a temperature sensor arrangement and controls a flow of heat transfer fluid through the primary side.
  • the US-A-4798242 shows the preamble of claim 1.
  • Such a multi-stage heat exchanger arrangement is for example made DE 197 02 897 C2 known.
  • the return of a heat source via a valve is opened, so that the primary side of the heat exchanger is flowed through by hot water from the heat source.
  • a three-way valve is controlled by a temperature sensor.
  • the heat transfer medium usually hot water, passed through one or more pipe sections in the heat exchanger.
  • the effective heat transfer area between the primary side and the secondary side is increased or decreased.
  • the invention has for its object to achieve a stable adjustment of the temperature at the output of the secondary side.
  • multiple valves which may be made correspondingly smaller, allows faster adjustment and improved stability.
  • the multiple valve design which may in principle be designed as simple throttle valves, is less expensive than the use of three-way valves having a more complicated structure.
  • With the new design can also ensure that a stream of heat transfer medium is not simply distributed in the manner of a three-way valve on the primary side of the heat exchanger assembly. It is also possible to supply all feed points with heat transfer fluid. Thus, it is possible, for example, to supply only one feed point with heat transfer fluid at a low heat consumption on the secondary side, which is located downstream of the first feed point on the primary side. Since the corresponding valve is only intended to regulate small flow rates, better stability is achieved because a small valve can be regulated more easily and quickly.
  • the temperature sensor arrangement preferably has at least one temperature sensor which determines the temperature of the fluid on the secondary side.
  • the inflow of heat transfer fluid can be controlled on the primary side in dependence on the temperature of the fluid on the secondary side.
  • the temperature sensor arrangement preferably has a number of temperature sensors corresponding to the number of feed points, which are arranged on the secondary side. Thus, the temperature influence of the secondary side can be detected even better by the primary side.
  • each temperature sensor is associated with a valve. So there are a number of temperature sensors that corresponds to the number of valves. For example, each valve can be controlled by its associated temperature sensor. If necessary, it is advantageous to comply with certain hierarchies. One possible approach is then to first operate only the valve which supplies the most downstream feed point on the primary side. Only when this valve fully open is, and the temperature is not sufficient, a valve is opened, which supplies a farther upstream feed point. In this way you get a stepped approach that can relatively quickly produce the desired temperature on the secondary side.
  • the temperature sensors are connected to a common control device which controls the valves.
  • the control device can then determine the heat requirement from the entirety of the temperature information and then possibly cause a different distribution of the heat transfer fluid to the primary side in order to obtain the desired service water temperature at the output of the secondary side.
  • At least one valve connected to a feed point located downstream of the first feed point is combined with a differential pressure regulator which maintains the pressure across the valve constant.
  • a differential pressure regulator which maintains the pressure across the valve constant.
  • Fig. 1 shows a heat exchanger assembly 1 with a heat exchanger 2, which has a primary side 3 and a secondary side 4.
  • the primary side 3 and the secondary side 4 are shown here only schematically. They are in a heat-transmitting connection to each other, so that heat, which is conveyed by a heat transfer fluid on the primary side 3, to another fluid, such as service water, can be transmitted to the secondary side 4.
  • the primary side is flowed through in a first direction (based on the representation of the Fig. 1 : from right to left) and the secondary side 4 in the opposite direction.
  • Service water is supplied to the secondary side 4 via an input 5 and removed at an output 6.
  • the primary side is a heat transfer fluid, for example, hot water from a district heating system, fed via a feed line 7 and removed via a return line 8.
  • the flow 7 splits into two branch lines 9, 10, of which the first branch line 9 is connected to a first feed point 11 of the primary side 3 and the second branch line 10 is connected to a second feed point 12 of the primary side 3.
  • the second feed point 12 is based on the flow through the primary side 3 downstream of the first feed point 11.
  • the secondary side 4 has two sections 14, 15, of which the section 14 is always used for heat transfer from the primary side 3 to the secondary side 4 (or vice versa), while the section 15 is used only when the heat transfer fluid via the branch line 9 is supplied to the first feed point 11.
  • a first valve 16 and in the second branch line 10 a second valve 17 is arranged. Both valves control the inflow of heat transfer fluid to the primary side 3 in each connected feed point 11, 12.
  • the first valve 16 is opened, then the first feed point 11 is supplied with heat transfer fluid, which then flows through the entire primary side 3.
  • the second valve 17 is opened, then heat transfer fluid is supplied at the second feed point 12, so that a heat transfer takes place only at the second portion 14 on the secondary side 4.
  • a first temperature sensor 18 is provided, which is arranged in the region of the first feed point 11, and a second temperature sensor 19, which is arranged in the region of the second feed point 12. Both temperature sensors 18, 19 detect the temperature on the secondary side. 4
  • the temperature sensor 18 is associated with the valve 16 and the temperature sensor 19 with the valve 17 so that the supply of heat transfer fluid can be controlled directly as a function of the temperature on the secondary side 4.
  • the first temperature sensor 18 determines that the setpoint temperature has not yet been reached, then the first temperature sensor 18 controls the first valve 16, so that an additional transfer of heat from the primary side 3 to the section 15 of the secondary side 4 is possible.
  • the opening and closing of the two valves 16, 17 is thus controlled by the two temperature sensors 18, 19.
  • the set point of the valves 16, 17 can be controlled via the valve control.
  • the valve control can be carried out in several different ways. For example, it is possible to close the valve 16 and open the valve 17, so that heat is transferred only in the section 14 of the secondary side 4. You can operate the valves 16, 17 so that the valve 16 is opened and the valve 17 is closed. In this case, heat is transferred to the secondary side 4 in sections 14 and 15. It is also possible to open both valves 16, 17. In this case, heat is transferred to the section 15 of the secondary side 4 and an increased heat transfer to the section 14 of the secondary side. 4
  • valves 16, 17 can, as shown, be operated directly by the temperature sensors 18, 19, for example by an electrical, magnetic or mechanical control. It is also possible to use manually operable valves 16, 17, which then have to be manually activated as a function of a sensed or measured temperature.
  • Fig. 2 shows an alternative embodiment of a heat exchanger assembly, wherein the same elements are provided with the same reference numerals.
  • the temperature sensors 18, 19 are arranged in both cases in the vicinity of the feed points 11, 12, so that they detect in principle the entire thermal effect of the heat supplied via the individual stages of the primary side.
  • Fig. 3 shows a further embodiment of a multi-stage heat exchanger assembly, wherein the same elements are provided with the same reference numerals, as in the Fig. 1 and 2 ,
  • Each valve 16, 17 has a drive 21, 22, wherein the drives 21, 22 are controlled by the temperature sensors 18, 19.
  • a pressure-controlled valve 23 is arranged, which is controlled via a membrane 24 and a capillary tube 25 from the supply pressure in front of the valve 17 and a diaphragm spring 26 shown only schematically.
  • the valve 23 thus ensures that the pressure drop across the valve 17 remains constant.
  • the first valve 16 is influenced solely by the temperature at the temperature sensor 18. The degree of opening of this valve 16 will therefore be set as a function of the temperature at the outlet of the secondary side 4.
  • the second valve 17 is adjusted in response to the pressure at the flow 7, because the pressure difference across the second valve 17 by means of the differential pressure regulator, which has the pressure-controlled valve 23 is kept constant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Control Of Temperature (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
EP05700556.3A 2004-01-09 2005-01-07 Mehrstufen-warmetauscheranordnung Not-in-force EP1704378B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004001379A DE102004001379B4 (de) 2004-01-09 2004-01-09 Mehrstufen-Wärmetauscheranordnung
PCT/DK2005/000005 WO2005066571A1 (de) 2004-01-09 2005-01-07 Mehrstufen-warmetauscheranordnung

Publications (2)

Publication Number Publication Date
EP1704378A1 EP1704378A1 (de) 2006-09-27
EP1704378B1 true EP1704378B1 (de) 2014-10-08

Family

ID=34716385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05700556.3A Not-in-force EP1704378B1 (de) 2004-01-09 2005-01-07 Mehrstufen-warmetauscheranordnung

Country Status (5)

Country Link
EP (1) EP1704378B1 (zh)
CN (1) CN100449252C (zh)
DE (1) DE102004001379B4 (zh)
RU (1) RU2314475C9 (zh)
WO (1) WO2005066571A1 (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005043952A1 (de) 2005-09-15 2007-04-05 Danfoss A/S Wärmetauscher und Verfahren zum Regeln eines Wärmetauschers
DE102009022640A1 (de) * 2009-05-26 2010-12-02 Danfoss A/S Ventilanordnung
RU2473014C1 (ru) * 2010-06-10 2013-01-20 Данфосс А/С Способ регулирования однотрубной системы теплоснабжения
AU2013329887B2 (en) * 2012-10-09 2018-02-01 Linde Aktiengesellschaft Method for controlling a temperature distribution in a heat exchanger
WO2014118047A1 (en) * 2013-02-01 2014-08-07 Tetra Laval Holdings & Finance S.A. A valve arrangement for a heat treatment apparatus
DE102013219716A1 (de) * 2013-09-30 2015-04-02 Siemens Aktiengesellschaft Vorrichtung und Verfahren zur automatisierten Nutzung von Abwärme
CN105277007B (zh) * 2015-09-28 2017-05-03 广州罗杰韦尔电气有限公司 一种石墨冷凝器的控制系统及方法
DK179248B1 (en) * 2016-09-12 2018-03-05 Danfoss As Tapping unit with only one connection
DK179208B9 (en) * 2016-09-12 2018-04-16 Danfoss As Fluid supply system
EP3525060B1 (en) * 2018-02-08 2021-04-21 Grundfos Holding A/S Flow control module and method for controlling the flow in a hydronic system
SE543008C2 (sv) * 2018-11-22 2020-09-22 Stockholm Exergi Ab Förfarande och system för balansering av massflöde under produktionsstörning eller -brist i ett fjärrvärmenät

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175685B (en) * 1985-05-30 1989-07-05 Aisin Seiki Heat exchange arrangements.
CN1155640A (zh) * 1995-10-20 1997-07-30 艾克泽吉公司 对外燃式动力系统供热
WO1998011391A1 (de) * 1996-09-11 1998-03-19 Limax Öl-Gas-Fernwärmetechnik Gmbh Methode zur temperaturvorregelung ohne hilfsenergie für brauchwassererwärmungssysteme mit und ohne zirkulation und vorrichtungen dafür
DE19702897C2 (de) * 1996-09-11 1998-10-01 Limax Oel Gas Fernwaermetechni Temperaturvorregelung für Brauchwasserwärmesysteme
GB9812238D0 (en) * 1998-06-08 1998-08-05 Schack Engineering Gb Limited Heat exchanger
GB0121375D0 (en) * 2001-09-04 2001-10-24 Ashe Morris Ltd Temperature control systems

Also Published As

Publication number Publication date
RU2314475C1 (ru) 2008-01-10
RU2314475C9 (ru) 2008-04-27
CN100449252C (zh) 2009-01-07
CN1910423A (zh) 2007-02-07
WO2005066571A1 (de) 2005-07-21
DE102004001379A1 (de) 2005-08-04
DE102004001379B4 (de) 2005-11-24
EP1704378A1 (de) 2006-09-27

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